Door for housing of pneumatic elevators.



'l -m:7|4,s62. Patentedbec. 2, |902.: c. nAnronm 000K FR HUUSING 0F PNEUMTIC ELVATRS.

(Application led May 17, 1902.)

(llo Model.)

mun.

UNITED STATES OIIESTER BRADFORD, OF

DOOR FOR HOUSING OF INDIANAPOLIS, INDIANA.

PNEUMATIC ELEVTORS.

SPECIFICATION forming part of Letters Patent No. 714,662, dated December 2, 1902.

Application tiled May 17, 1902.

` citizen of the United States, residing at Indianapolis, iu the county of Marion and State of Indiana, have invented certain new and useful Improvements in Doors for Housing of Pneumatic Elevators, ot' which the following is a specification.

In pneumatic elevators and weighers-snch, for example, as are shown and described in Letters Patent of the United- States No. 603,925, issued to the Pneumatic Elevator and Weigher Company May 10, 1898, upon the application of James B. Schuman-it occasionally happens on account of some accident, such as the breaking or flying off of a belt or the choking `of a separator to which such elevator is attached, that the throwing-wheel and fan-housing or hoot will become clogged with grain. In such a case the most convenient way of cleaning out the same is by means of an opening provided for the purpose in the housing-bottom and a door for closing said opening. It is, however, quite desirable that smoothness of the inner surface of the bottom shall be maintained, and

` it is also of great importance that the door shall be so constructed as to be quickly and easily removable and replaceable. It is also highly desirable that said door should be so constructed and fitted as to not likely become stuck by paint, rust, or otherwise and parts, Figure l is a side elevation of a pneumatic elevator boot or housing of the character in question; Fig. 2, an edge elevation Vthereof as seen when looking toward the right-hand side of Fig. 1; Fig. 3, an under side or plan view as seen when looking-upwardly toward the bottom end of Fig. 1, but on a considerably-enlarged scale; Fig. 4, a detail sectional View through my improved door and immediately adjacent parts as seen Serial No. 107,797. (No model() when looking in the direction indicated by the arrows from the dotted line 4 4 in Fig. 3 and showing the smooth interior surface at this point; Fig. 5, a detail transverse sectional viewas seen when looking in the direction indicated by the arrows from the dotted line 5 5 in Fig. 3; and Fig. (i a detail or fragmentary view similar in other respects to a portion of Fig. 5, but showingthe clamping-bolt in the position it occupies while being inserted or put into place.

The housing in question comprises two main sides and 16, made of cast-iron, rims or circular walls 17 and 1S, which inclose the throwing-wheel and blast-fan chambers, respectively, and which are seated in grooves in the inner faces of the sides 15 and 16, as best shown in Fig. 5, a series of bolts clamping the sides onto said circular walls, and various other parts and accessories, which (as they do not especially relate to my present invention) need not be described herein.

I provide the opening in question in the rim or circular wall17 by punching out therefrom a piece 19 of suitable size, which piece is adapted to t back into the opening from which it is punched, and thus form a perfectlyfitting door for such opening. In preparing this piece 19 to be used as such door I provide a light frame-like casting 20, preferably of malleable iron, having at one end one or more points 21, (two are shown,) adapted to pass either under a bolt 22 or suitable lugs on the sides15 and 16, which may be provided' for the purpose, and at the other end ears 23,

which carry small bolts 24, preferably having wing-nuts 25 and which engage with bifurcated lugs 26 on the sides 15 and 16. The points 2l are adapted to be bent over in the form of hooks, (see especially in Fig. 4,) so that the structure may remain suspended thereto, if desired. Just behind these points or hooks I form wedge-like or inclined raised surfaces 30 on the frame 20. In placing the door structure in position these pass under the bolt 22 and serve to wedge the said door structure tightly up into position. This is an easy means of securing thedesired Hush and smooth interior surface when the door is closed.

The bolts are shown as eyebolts, and bearings 27 therefor are formed in the ears 23 on IOO the frame 20, which bearings are shown as rounded on the working sides, so that in their movements these bolts swing around an unchanging axis, as when mounted on a pivot vor shaft. The upper sides ofthe bearings 27 are iattencd, as best shown in Figs. 5 and 6, and the open sides of the eyes of the bolts 24 are just large enough to permit the bolts to be slipped into place when they are held in the position shown in Fig. 6, so that when swung around into operative position, as shown in Fig. 5, or when held in any other position than the particular position shown in Fig. 6 they can not drop off and become lost. These bolts, therefore, are capable of easy and speedy removal and replacement without removing the nuts, while at the same time there is little danger of their becoming lost through ordinary accidental displacement, as the position which they must occupy while being removed and replaced is, as will be readily understood, abnormal and one which they are not likely to get into, except when purposely so placed. The ears 23, as best shown in Figs. 3, 5, and 6, also have vfianges 28, which extend down somewhat be` low the under side of the bearings for the bolts and form side guards to prevent said bolts from moving around sidewise, and thus becoming detached when in that position. These flanges run back onto the body of the :frame 20, as best shown in Fig. 5, and thus act as braces to stiffen and strengthen the ears.

I-Iaving thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a boot or housing for pneumatic elevators having au opening in the bottom thereof, of a door for closing said opening consisting of a piece adapted to fit therein, a frame carrying said piece formed at one end to engage with a supporting device carried by the sides of the housing and having ears at the other end, locking-bolts engaging with said ears, and the housing sides provided with lugs with which said lockingbolts may also engage.

2. The combination, in a boot or housing for pneumatic elevators, of the sides 15 and 16 having bifurcated lugs 26 thereon, the rim-piece 17 surroundingthe throwing-Wheel space in said housing and having an opening in the bottom side thereof, a door 19 for closing said opening, a frame 20 on said door adapted at one end to engage with a support (as the bolt 22) and provided with ears at the other end, and latch-bolts carried by said ears and adapted to engage with said lugs 26, all substantially as shown and described.

3. The combination, in a boot or housing for pneumatic elevators, of a rim-piece having an opening therein, a door for closing said opening consisting of a piece adapted to fit therein and provided with suitable supports, and means for detachably engaging said supports whereby said door may be held in place in said opening or removed therefrom, substantially as and for the purposes set forth.

4. The combination, in a boot or housing for pneumatic elevators having an opening in the bottom thereof, of a door for closing said opening consisting of a piece adapted to fit therein and provided with suitable supports including ears carried by said door, other ears or lugs carried by the housing sides, and latch-bolts having open eyes adapted to engage with a suitable bearing on said ears, the said bearing having one side liattencd but being otherwise substantially circular in crosssection, substantially as and for the purposes set forth.

5. The combination, in a boot or housing for pneumatic elevators having an opening i n the bottom thereof, of a door for closing` said opening, a frame secured to said door having ears extending out therefrom with transverse bearings at the ends of said ears adapted to receive eyebolts and guard-anges extending down along said eyebolts for preventing undue sidewise motion thereof, suitable engaging lugs on the housing sides, and said eyebolts, substantially as set forth.

6. The combination,in a boot or housing for pneumatic elevators having an opening in the bottom thereof, a door for closing said opening, supports for said door, inclined parts on thedoor structure adapted to pass under the supports at one side of the door and thus raise it up to the desired position, and other detachable and adjustable supports at the other side of said door.

f In witness whereof I have hereunto set my hand. and seal at Indianapolis, Indiana, this 13th day of May, A. D. 1902.

CHESTER BRADFORD.

IOO 

